Cyber Resilience

CVE-2021-24026

Critical

Published: 06 April 2021

Published
06 April 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0044 63.7th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-24026 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Whatsapp Whatsapp. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 36.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A missing bounds check within the audio decoding pipeline for WhatsApp calls in WhatsApp for Android prior to v2.21.3, WhatsApp Business for Android prior to v2.21.3, WhatsApp for iOS prior to v2.21.32, and WhatsApp Business for iOS prior to v2.21.32…

more

could have allowed an out-of-bounds write.

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

whatsapp
whatsapp
≤ 2.21.3 · ≤ 2.21.3
whatsapp
whatsapp business
≤ 2.21.3 · ≤ 2.21.32

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References